have-\-\-had make-\-\-made put-\-\-put read-\-\-read throw-\-\-threw 一、写出下列动词的过去式或动词原形。 1.go___ 2.is___ 3.buy___ 4.swim___ 5.have ___ 6. watched ___ 7. ate___ 8. go...
4. 现在完成进行时(have/has been doing) 表示某一动作开始于过去某一时间,延续或重复地出现至今,或将继续延续至将来。 例:We have been working on this project for over a month now...
2.时间状语:recently, lately, since…for…,in the past few years, etc. 3.基本结构:have/has + done 4.否定形式:have/has + not + done. 5.一般疑问句:have或has提前。 6.例句:I've written an article. It has been raining these days. 六、过去完成时 1.概念:以...
—Sorry,I have no idea. A、/; bought B、has; bought C、did; buy D、does; buy (点击选项查看答案) do you think 是插入语,可以将其去掉,分析句意应用过去时态和陈述语序。 点击查看...
1. have (has) gone to表示"已经去某地了",不能与for+一段时间连用。 She has gone to Shanghai.(她可能已在去上海的路上,或已到上海,总之现在不在这里。) 2. have (has) been to表示"...
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